protected override void Dispose(bool disposing)
{
if (_isDisposed)
{
return;
}
_isDisposed = true;
if (disposing)
{
SetOnClickListener(null);
SetOnTouchListener(null);
RemoveOnAttachStateChangeListener(this);
_automationPropertiesProvider?.Dispose();
_tracker?.Dispose();
_backgroundTracker?.Dispose();
_backgroundTracker = null;
if (Element != null)
{
Element.PropertyChanged -= OnElementPropertyChanged;
if (Platform.GetRenderer(Element) == this)
{
Element.ClearValue(Platform.RendererProperty);
}
}
}
base.Dispose(disposing);
}
protected override void OnElementChanged(ElementChangedEventArgs <Button> e)
{
base.OnElementChanged(e);
if (e.OldElement != null)
{
}
if (e.NewElement != null)
{
if (Control == null)
{
AppCompatButton button = CreateNativeControl();
button.SetOnClickListener(ButtonClickListener.Instance.Value);
button.SetOnTouchListener(ButtonTouchListener.Instance.Value);
button.Tag = this;
_textColorSwitcher = new TextColorSwitcher(button.TextColors);
SetNativeControl(button);
button.AddOnAttachStateChangeListener(this);
}
if (_backgroundTracker == null)
{
_backgroundTracker = new ButtonBackgroundTracker(Element, Control);
}
else
{
_backgroundTracker.Button = e.NewElement;
}
UpdateAll();
}
}
protected override void Dispose(bool disposing)
{
if (_isDisposed)
{
return;
}
_isDisposed = true;
if (disposing)
{
if (Control != null)
{
Control.SetOnClickListener(null);
Control.SetOnTouchListener(null);
Control.RemoveOnAttachStateChangeListener(this);
Control.Tag = null;
_textColorSwitcher = null;
}
_backgroundTracker?.Dispose();
_backgroundTracker = null;
}
base.Dispose(disposing);
}
void IVisualElementRenderer.SetElement(VisualElement element)
{
if (element == null)
{
throw new ArgumentNullException(nameof(element));
}
if (!(element is Button))
{
throw new ArgumentException($"{nameof(element)} must be of type {nameof(Button)}");
}
VisualElement oldElement = Button;
Button = (Button)element;
var reference = Guid.NewGuid().ToString();
Performance.Start(reference);
if (oldElement != null)
{
oldElement.PropertyChanged -= OnElementPropertyChanged;
}
if (_backgroundTracker == null)
{
_backgroundTracker = new ButtonBackgroundTracker(Button, this);
}
else
{
_backgroundTracker.Button = Button;
}
Color currentColor = oldElement?.BackgroundColor ?? Color.Default;
if (element.BackgroundColor != currentColor)
{
UpdateBackgroundColor();
}
element.PropertyChanged += OnElementPropertyChanged;
if (_tracker == null)
{
// Can't set up the tracker in the constructor because it access the Element (for now)
SetTracker(new VisualElementTracker(this));
}
OnElementChanged(new ElementChangedEventArgs <Button>(oldElement as Button, Button));
SendVisualElementInitialized(element, this);
EffectUtilities.RegisterEffectControlProvider(this, oldElement, element);
Performance.Stop(reference);
}